Keywords: West I-70 through Utah approaching the San Rafael Reef.jpg Interstate 70 through Utah <br> View west Approaching the San Rafael Reef from the San Rafael Desert onto the en San Rafael Swell I-70 traverses east-west across the Swell which trends southwest-by-northeast The San Rafael Reef made of cliffs of en Navajo Sandstone is at the east border of the San Rafael Swell from the east the SR Reef extends southwest as the border between the Swell north and the San Rafael Desert southeast Own 2008-02-14 ErgoSum88 Interstate 70 in Utah San Rafael Reef San Rafael Desert San Rafael Swell Navajo Sandstone in Utah Navajo Sandstone |